0.1Hz超低频交流试验系统的研究

Research on 0.1 Hz Ultra Low Frequency AC Test System

传统的直流电压试验、工频交流耐压试验等方法对于XLPE电力电缆的预防性试验都存在自身的缺陷,现提出采用0.1 Hz超低频交流耐压试验系统对XLPE电缆进行预防性试验。根据0.1 Hz超低频交流波形,采用正负电压充电的方式设计了发生器的主电路,并利用PSPICE软件对于电路的可行性进行了分析。分析结果表明,所设计的电路能够产生良好的试验波形,满足试验的要求。

There exist flaws in DC voltage test,power frequency voltage withstand test and other traditional preventive tests for XLPE electrical cable.This paper proposes a voltage withstand test system using 0.1 Hz ultra low frequency AC to protect the XLPE cable.For the test system,conjugate method is adopted to design the main circuit of generator in the light of the 0.1Hz ultra low frequency AC waveform.The feasibility of the circuit is analyzed by PSPICE software,which indicates that the designed circuit can produce test waveform good enough to satisfy the test requirements.